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Finding the Third Proportional to 78,821 and 118,251

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Solution

The third proportional to 78,821 and 118,251 is: 177,405.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821 : 118,251 = 118,251 : x
  2. Step 2: Convert to fraction form
    78,821/118,251 = 118,251/x
  3. Step 3: Cross multiply
    78,821x = 118,251 × 118,251
  4. Step 4: Simplify right side
    78,821x = 13,983,299,001
  5. Step 5: Solve for x
    x = 13,983,299,001/78,821
  6. Step 6: Final answer
    x = 177,405.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.